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This map shows a summary of the presence/absence of coho salmon young-of-the-year in streams in the north portion of the
California Department of Fish and Game's (CDFG) Central Coast Region for the years 1988-1999. Coho populations are most
persistent in the central Mendocino coast (Jackson Demonstration State Forest and adjacent coastal streams) and southwestern
Marin County. This map contains data for all the streams listed as known historically to harbor coho salmon in a draft CDFG
database, but there are likely other historical coho streams that are not included in that database. Absence data are provisional
pending more extensive study, because coho may exist in some streams but only occur in some years or may have resided in other
reaches of streams not surveyed. Some streams from the CDFG database are not included in this shapefile hydrography layers
were not available (including the Eel River, the coast north of Wages Creek, and coastline adjacent to the Gualala River). This
map/database groups data at the scale of entire streams, and differences in coho presence/absence between different reaches in
the same stream are not shown. Because of this, some streams appear on this map to have coho above dams, where in reality
they almost certainly do not.
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